(C++) GetFilesInFolder

 

 

GetFilesInFolder is a file I/O code snippet to obtain all filenames in a folder.

 

• Download the Qt Creator project 'CppGetFilesInFolder' (zip)

Technical facts

 

Operating system(s) or programming environment(s)

• Lubuntu 15.04 (vivid)

IDE(s):

• Qt Creator 3.1.1

Project type:

• Console application

C++ standard:

• C++98

Compiler(s):

• G++ 4.9.2

Libraries used:

• STL: GNU ISO C++ Library, version 4.9.2

 

 

 

 

 

Qt project file: ./CppGetFilesInFolder/CppGetFilesInFolder.pro

 

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include(../../ConsoleApplication.pri) #Or use the code below # QT += core # QT += gui # greaterThan(QT_MAJOR_VERSION, 4): QT += widgets # CONFIG   += console # CONFIG   -= app_bundle # TEMPLATE = app # CONFIG(release, debug|release) { #   DEFINES += NDEBUG NTRACE_BILDERBIKKEL # } # QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++ # unix { #   QMAKE_CXXFLAGS += -Werror # } include(../../Libraries/BoostAll.pri) SOURCES += main.cpp

 

 

 

 

 

./CppGetFilesInFolder/main.cpp

 

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#include <iostream> #include <string> #include <vector> #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #include <boost/filesystem.hpp> #include <QDir> #pragma GCC diagnostic pop //From http://www.richelbilderbeek.nl/CppGetFilesInFolder.htm const std::vector<std::string> GetFilesInFolderBoost(const std::string& folder) {   std::vector<std::string> v;   const boost::filesystem::path my_folder     = boost::filesystem::system_complete(         boost::filesystem::path(folder));   if (!boost::filesystem::is_directory(my_folder)) return v;   const boost::filesystem::directory_iterator j;   for ( boost::filesystem::directory_iterator i(my_folder);         i != j;         ++i)   {     if ( boost::filesystem::is_regular_file( i->status() ) )     {       const std::string filename = i->path().filename().string();       //Works with older version of Boost.Filesystem:       //const std::string filename = i->path().filename();       v.push_back(filename);     }   }   return v; } ///GetFilesInFolder creates a std::vector of filenames in a certain folder. //From http://www.richelbilderbeek.nl/CppGetFilesInFolder.htm const std::vector<std::string> GetFilesInFolderQt(const std::string& folder) {   QDir dir(folder.c_str());   dir.setFilter(QDir::Files);   const QFileInfoList list = dir.entryInfoList();   //Convert QFileInfoList to std::vector<std::string> of filenames   std::vector<std::string> v;   const int size = list.size();   for (int i = 0; i != size; ++i)   {     const std::string file_name = list.at(i).fileName().toStdString();     v.push_back(file_name);   }   return v; } int main() {   const std::string folder = ".";   assert(GetFilesInFolderBoost(folder) == GetFilesInFolderQt(folder));   const std::vector<std::string> v = GetFilesInFolderBoost(folder);   std::copy(v.begin(),v.end(),std::ostream_iterator<std::string>(std::cout,"\n"));   std::cout << "Number of files: " << v.size() << '\n'; } /* Screen output: Makefile Makefile.Debug Makefile.Release Number of files: 3 */